diff --git a/nonebot/__init__.py b/nonebot/__init__.py
new file mode 100644
index 00000000..5dc9f792
--- /dev/null
+++ b/nonebot/__init__.py
@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import logging
+from .log import logger
+
+logger.setLevel(level=logging.DEBUG)
+
+from .plugin import load_plugins, get_loaded_plugins
diff --git a/nonebot/event.py b/nonebot/event.py
index f79d0396..e5e576ac 100644
--- a/nonebot/event.py
+++ b/nonebot/event.py
@@ -1,4 +1,7 @@
-from typing import Dict, Any, Optional
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from typing import Any, Dict, Optional
 
 
 class Event(dict):
diff --git a/nonebot/exception.py b/nonebot/exception.py
index de674b15..a0a5ca59 100644
--- a/nonebot/exception.py
+++ b/nonebot/exception.py
@@ -1,3 +1,7 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+
 class PausedException(Exception):
     """Block a message from further handling and try to receive a new message"""
     pass
diff --git a/nonebot/log.py b/nonebot/log.py
new file mode 100644
index 00000000..180f1a75
--- /dev/null
+++ b/nonebot/log.py
@@ -0,0 +1,11 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import sys
+import logging
+
+logger = logging.getLogger("nonebot")
+default_handler = logging.StreamHandler(sys.stdout)
+default_handler.setFormatter(
+    logging.Formatter("[%(asctime)s %(name)s] %(levelname)s: %(message)s"))
+logger.addHandler(default_handler)
diff --git a/nonebot/matcher.py b/nonebot/matcher.py
index c2ed44d7..344fee6a 100644
--- a/nonebot/matcher.py
+++ b/nonebot/matcher.py
@@ -1,76 +1,70 @@
-import re
-import copy
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
 from functools import wraps
-from typing import Type, Union, Optional, Callable
+from collections import defaultdict
+from typing import Type, List, Dict, Optional, Callable
 
 from .event import Event
-from .typing import Scope, Handler
-from .rule import Rule, startswith, regex, user
+from .typing import Handler
+from .rule import Rule, user
 from .exception import PausedException, RejectedException, FinishedException
 
+matchers: Dict[int, List[Type["Matcher"]]] = defaultdict(list)
+
 
 class Matcher:
 
     rule: Rule = Rule()
-    scope: Scope = "ALL"
-    permission: str = "ALL"
-    block: bool = True
-    handlers: list = []
+    handlers: List[Handler] = []
     temp: bool = False
+    priority: int = 1
 
     _default_state: dict = {}
-    _default_parser: Optional[Callable[[Event, dict], None]] = None
-    _args_parser: Optional[Callable[[Event, dict], None]] = None
+
+    # _default_parser: Optional[Callable[[Event, dict], None]] = None
+    # _args_parser: Optional[Callable[[Event, dict], None]] = None
 
     def __init__(self):
         self.handlers = self.handlers.copy()
         self.state = self._default_state.copy()
-        self.parser = self._args_parser or self._default_parser
+        # self.parser = self._args_parser or self._default_parser
 
     @classmethod
-    def new(
-        cls,
-        rule: Rule = Rule(),
-        scope: Scope = "ALL",
-        permission: str = "ALL",
-        block: bool = True,
-        handlers: list = [],
-        temp: bool = False,
-        *,
-        default_state: dict = {},
-        default_parser: Optional[Callable[[Event, dict], None]] = None,
-        args_parser: Optional[Callable[[Event, dict], None]] = None
-    ) -> Type["Matcher"]:
-
-        # class NewMatcher(cls):
-        #     rule: Rule = rule
-        #     scope: Scope = scope
-        #     permission: str = permission
-        #     block: bool = block
-        #     handlers: list = handlers
-        #     temp: bool = temp
-
-        #     _default_state = default_state
+    def new(cls,
+            rule: Rule = Rule(),
+            handlers: list = [],
+            temp: bool = False,
+            priority: int = 1,
+            *,
+            default_state: dict = {}) -> Type["Matcher"]:
 
         NewMatcher = type(
             "Matcher", (Matcher,), {
                 "rule": rule,
-                "scope": scope,
-                "permission": permission,
-                "block": block,
                 "handlers": handlers,
                 "temp": temp,
-                "_default_state": default_state,
-                "_default_parser": default_parser,
-                "_args_parser": args_parser,
+                "priority": priority,
+                "_default_state": default_state
             })
 
+        matchers[priority].append(NewMatcher)
+
         return NewMatcher
 
+    # @classmethod
+    # def args_parser(cls, func: Callable[[Event, dict], None]):
+    #     cls._default_parser = func
+    #     return func
+
     @classmethod
-    def args_parser(cls, func: Callable[[Event, dict], None]):
-        cls._default_parser = func
-        return func
+    def handle(cls):
+
+        def _decorator(func: Handler) -> Handler:
+            cls.handlers.append(func)
+            return func
+
+        return _decorator
 
     @classmethod
     def receive(cls):
@@ -78,121 +72,78 @@ class Matcher:
         def _decorator(func: Handler) -> Handler:
 
             @wraps(func)
-            def _handler(event: Event, state: dict):
+            async def _handler(bot, event: Event, state: dict):
                 raise PausedException
 
             cls.handlers.append(_handler)
+            cls.handlers.append(func)
 
             return func
 
         return _decorator
 
-    @classmethod
-    def got(cls,
-            key: str,
-            prompt: Optional[str] = None,
-            args_parser: Optional[Callable[[Event, dict], None]] = None):
+    # @classmethod
+    # def got(cls,
+    #         key: str,
+    #         prompt: Optional[str] = None,
+    #         args_parser: Optional[Callable[[Event, dict], None]] = None):
 
-        def _decorator(func: Handler) -> Handler:
+    #     def _decorator(func: Handler) -> Handler:
 
-            @wraps(func)
-            def _handler(event: Event, state: dict):
-                if key not in state:
-                    if state.get("__current_arg__", None) == key:
-                        state[key] = event.message
-                        del state["__current_arg__"]
-                        return func(event, state)
-                    state["__current_arg__"] = key
-                    cls._args_parser = args_parser
-                    raise RejectedException
+    #         @wraps(func)
+    #         def _handler(event: Event, state: dict):
+    #             if key not in state:
+    #                 if state.get("__current_arg__", None) == key:
+    #                     state[key] = event.message
+    #                     del state["__current_arg__"]
+    #                     return func(event, state)
+    #                 state["__current_arg__"] = key
+    #                 cls._args_parser = args_parser
+    #                 raise RejectedException
 
-                return func(event, state)
+    #             return func(event, state)
 
-            cls.handlers.append(_handler)
+    #         cls.handlers.append(_handler)
 
-            return func
+    #         return func
 
-        return _decorator
+    #     return _decorator
 
-    @classmethod
-    def finish(cls, prompt: Optional[str] = None):
-        raise FinishedException
+    # @classmethod
+    # def finish(cls, prompt: Optional[str] = None):
+    #     raise FinishedException
 
-    @classmethod
-    def reject(cls, prompt: Optional[str] = None):
-        raise RejectedException
+    # @classmethod
+    # def reject(cls, prompt: Optional[str] = None):
+    #     raise RejectedException
 
-    async def run(self, event):
+    async def run(self, bot, event):
         if not self.rule(event):
             return
 
         try:
-            if self.parser:
-                await self.parser(event, state)  # type: ignore
+            # if self.parser:
+            #     await self.parser(event, state)  # type: ignore
 
             for _ in range(len(self.handlers)):
                 handler = self.handlers.pop(0)
-                await handler(event, self.state)
+                await handler(bot, event, self.state)
         except RejectedException:
-            # TODO: add tmp matcher to matcher tree
-            self.handlers.insert(handler, 0)
-            matcher = Matcher.new(self.rule,
-                                  self.scope,
-                                  self.permission,
-                                  self.block,
+            self.handlers.insert(0, handler)  # type: ignore
+            matcher = Matcher.new(user(event.user_id) & self.rule,
                                   self.handlers,
                                   temp=True,
-                                  default_state=self.state,
-                                  default_parser=self._default_parser,
-                                  args_parser=self._args_parser)
+                                  priority=0,
+                                  default_state=self.state)
+            matchers[0].append(matcher)
             return
         except PausedException:
-            # TODO: add tmp matcher to matcher tree
-            matcher = Matcher.new(self.rule,
-                                  self.scope,
-                                  self.permission,
-                                  self.block,
+            matcher = Matcher.new(user(event.user_id) & self.rule,
                                   self.handlers,
                                   temp=True,
-                                  default_state=self.state,
-                                  default_parser=self._default_parser,
-                                  args_parser=self._args_parser)
+                                  priority=0,
+                                  default_state=self.state)
+            matchers[0].append(matcher)
             return
         except FinishedException:
             return
-
-
-def on_message(rule: Rule,
-               scope="ALL",
-               permission="ALL",
-               block=True,
-               *,
-               handlers=[],
-               temp=False,
-               state={}) -> Type[Matcher]:
-    # TODO: add matcher to matcher tree
-    return Matcher.new(rule,
-                       scope,
-                       permission,
-                       block,
-                       handlers=handlers,
-                       temp=temp,
-                       default_state=state)
-
-
-# def on_startswith(msg,
-#                   start: int = None,
-#                   end: int = None,
-#                   rule: Optional[Rule] = None,
-#                   **kwargs) -> Type[Matcher]:
-#     return on_message(startswith(msg, start, end) &
-#                       rule, **kwargs) if rule else on_message(
-#                           startswith(msg, start, end), **kwargs)
-
-# def on_regex(pattern,
-#              flags: Union[int, re.RegexFlag] = 0,
-#              rule: Optional[Rule] = None,
-#              **kwargs) -> Type[Matcher]:
-#     return on_message(regex(pattern, flags) &
-#                       rule, **kwargs) if rule else on_message(
-#                           regex(pattern, flags), **kwargs)
diff --git a/nonebot/plugin.py b/nonebot/plugin.py
new file mode 100644
index 00000000..7f071425
--- /dev/null
+++ b/nonebot/plugin.py
@@ -0,0 +1,99 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import os
+import re
+import importlib
+from types import ModuleType
+from typing import Set, Dict, Type, Optional
+
+from .log import logger
+from .rule import Rule
+from .matcher import Matcher
+
+plugins: Dict[str, "Plugin"] = {}
+
+_tmp_matchers: Set[Type[Matcher]] = set()
+
+
+class Plugin(object):
+
+    # TODO: store plugin informations
+    def __init__(self, module_path: str, module: ModuleType,
+                 matchers: Set[Type[Matcher]]):
+        self.module_path = module_path
+        self.module = module
+        self.matchers = matchers
+
+
+def on_message(rule: Rule,
+               *,
+               handlers=[],
+               temp=False,
+               priority: int = 1,
+               state={}) -> Type[Matcher]:
+    matcher = Matcher.new(rule,
+                          temp=temp,
+                          priority=priority,
+                          handlers=handlers,
+                          default_state=state)
+    _tmp_matchers.add(matcher)
+    return matcher
+
+
+# def on_startswith(msg,
+#                   start: int = None,
+#                   end: int = None,
+#                   rule: Optional[Rule] = None,
+#                   **kwargs) -> Type[Matcher]:
+#     return on_message(startswith(msg, start, end) &
+#                       rule, **kwargs) if rule else on_message(
+#                           startswith(msg, start, end), **kwargs)
+
+# def on_regex(pattern,
+#              flags: Union[int, re.RegexFlag] = 0,
+#              rule: Optional[Rule] = None,
+#              **kwargs) -> Type[Matcher]:
+#     return on_message(regex(pattern, flags) &
+#                       rule, **kwargs) if rule else on_message(
+#                           regex(pattern, flags), **kwargs)
+
+
+def load_plugin(module_path: str) -> Optional[Plugin]:
+    try:
+        _tmp_matchers.clear()
+        module = importlib.import_module(module_path)
+        plugin = Plugin(module_path, module, _tmp_matchers.copy())
+        plugins[module_path] = plugin
+        logger.info(f"Succeeded to import \"{module_path}\"")
+        return plugin
+    except Exception as e:
+        logger.error(f"Failed to import \"{module_path}\", error: {e}")
+        logger.exception(e)
+        return None
+
+
+def load_plugins(plugin_dir: str) -> Set[Plugin]:
+    plugins = set()
+    for name in os.listdir(plugin_dir):
+        path = os.path.join(plugin_dir, name)
+        if os.path.isfile(path) and \
+                (name.startswith("_") or not name.endswith(".py")):
+            continue
+        if os.path.isdir(path) and \
+                (name.startswith("_") or not os.path.exists(
+                    os.path.join(path, "__init__.py"))):
+            continue
+
+        m = re.match(r"([_A-Z0-9a-z]+)(.py)?", name)
+        if not m:
+            continue
+
+        result = load_plugin(f"{plugin_dir.replace(os.sep, '.')}.{m.group(1)}")
+        if result:
+            plugins.add(result)
+    return plugins
+
+
+def get_loaded_plugins() -> Set[Plugin]:
+    return set(plugins.values())
diff --git a/nonebot/rule.py b/nonebot/rule.py
index 4f18a383..50ac9b5a 100644
--- a/nonebot/rule.py
+++ b/nonebot/rule.py
@@ -1,3 +1,6 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
 import re
 from typing import Union, Callable, Optional
 
diff --git a/nonebot/typing.py b/nonebot/typing.py
index bb11c609..378ae29e 100644
--- a/nonebot/typing.py
+++ b/nonebot/typing.py
@@ -1,4 +1,6 @@
-from typing import Literal, Callable
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 
-Scope = Literal["PRIVATE", "DISCUSS", "GROUP", "ALL"]
-Handler = Callable[["Event", dict], None]
+from typing import Callable, Awaitable
+
+Handler = Callable[["Bot", "Event", dict], Awaitable[None]]
diff --git a/tests/bot.py b/tests/bot.py
new file mode 100644
index 00000000..8a4eb8e4
--- /dev/null
+++ b/tests/bot.py
@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import os
+import sys
+
+sys.path.insert(0, os.path.abspath(os.path.dirname(os.path.dirname(__file__))))
+
+import nonebot
+from nonebot.matcher import matchers
+
+if __name__ == "__main__":
+    nonebot.load_plugins(os.path.join(os.path.dirname(__file__),
+                                      "test_plugins"))
+    print(nonebot.get_loaded_plugins())
+    print(matchers)
+    print(matchers[1][0].handlers)
diff --git a/tests/test_plugins/test_matcher.py b/tests/test_plugins/test_matcher.py
new file mode 100644
index 00000000..5a1bb3ea
--- /dev/null
+++ b/tests/test_plugins/test_matcher.py
@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from nonebot.rule import Rule
+from nonebot.event import Event
+from nonebot.plugin import on_message
+
+test_matcher = on_message(Rule(), state={"default": 1})
+
+
+@test_matcher.handle()
+async def test_handler(bot, event: Event, state: dict):
+    print(state)